Subepithelial Connective Tissue Graft Versus Amniotic Chorion Membrane for Peri-implant Mucosal Thickness Enhancement

Inclusion Criteria: * Patients with good systemic health with no contraindication for periodontal surgery. * No history of any medications in the previous 6 months that may interfere with periodontal tissue health or healing. * Ability to maintain good oral hygiene as evidenced in recall visits. * Aged 30 to 55 years. * Stable periodontal condition and missing one single tooth (maxillary anterior teeth and premolars) with adjacent teeth present and thin mucosal phenotype (\< 2mm bucco- lingual thickness). Exclusion Criteria: * Medically compromised patients and systemic conditions precluding periodontal surgery. * Smokers. * Severe hematologic disorders (e.g., hemophilia or leukemia), uncontrolled infectious or metabolic diseases that could compromise normal healing, liver, or kidney dysfunction/failure. * Patients subjected to irradiation in the head and neck area. * Patients treated or under treatment with intravenous amino bisphosphonates. * Patient affected by active periodontitis or has poor oral hygiene and motivation. * Uncontrolled diabetes mellitus. * Pregnant women or planning become pregnant, and nursing mothers.